We're dividing 801139 by 15 
The aim is to understand the frequency of 15 in 801139.

Going ahead to step 1:
The number 15 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 15

Going ahead to step 2:
15 can be fit into 80 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 5 after subtracting 75 from 80.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 15

Advancing to step 3:
The number 15 fits into 51 3 times, leaving a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 53.0
The remainder is 6 after subtracting 45 from 51.
Bring next digit (1) of the dividend behind the 6 and repeat the process: 61 / 15

Advancing to step 4:
61 divided by 15 is 4 with a remainder of 1.
Use 4 as the next digit of our solution. 
Result so far: 534.0
Subtracting 60 from 61 leaves us with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 15

Advancing to step 5:
If we divide 13 by 15, we get 0 and a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 5340.0
The remainder is 13 after subtracting 0 from 13.
Grab the next digit (9) from the dividend, add it to 13, then carry on: 139 / 15

Moving on to step 6:
15 can be fit into 139 9 times, resulting in a remainder of 4.
Write down 9 as next digit of the result. 
Result so far: 53409.0
Subtract 135 from 139 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 7:
15 can be fit into 40 2 times, resulting in a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 53409.2
If we take 30 away from 40, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
15 can be fit into 100 6 times, resulting in a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 53409.26
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 9:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 53409.266
If we subtract 90 from 100, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The quotient of the division is 53409.266, and the remainder is 0.001.